DELAYING LASH CROSSING FOR A MODULAR HYBRID TRANSMISSION
First Claim
Patent Images
1. A method of controlling an electrified vehicle powertrain comprising:
- producing a first torque in an unpowered electric machine by rotating an input of the machine;
using the machine for regenerative braking to slow the input below an engine idle speed to a non-zero desired input speed;
powering the machine at the desired speed to produce a second torque, opposite the first torque, and lash cross the input.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of controlling lash crossing in a hybrid electric automotive powertrain. During deceleration while the powertrain is operating in electric only mode, an input is slowed to a first speed lower than an idle speed of an internal combustion engine. Lash crossing is delayed until the input has slowed to the first speed. When the first speed is zero, lash crossing is delayed until receipt of an acceleration request.
-
Citations
18 Claims
-
1. A method of controlling an electrified vehicle powertrain comprising:
-
producing a first torque in an unpowered electric machine by rotating an input of the machine; using the machine for regenerative braking to slow the input below an engine idle speed to a non-zero desired input speed; powering the machine at the desired speed to produce a second torque, opposite the first torque, and lash cross the input. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method of controlling an electrified vehicle powertrain comprising:
-
producing a first torque in an unpowered electric machine by rotating an input of the machine; using the machine for regenerative braking to slow the input below an engine idle speed to a non-zero desired input speed; powering the machine when the desired speed is reached to produce a second torque, opposite the first torque, and lash cross the input. - View Dependent Claims (7, 8, 9, 10, 11)
-
-
12. A method of controlling an electrified vehicle powertrain comprising:
-
charging a battery of an automotive powertrain by rotating an input to produce a first torque in an unpowered electric machine; slowing rotation of the input below an engine idle speed to a target speed; delaying, until the target speed is reached, powering the machine to produce a second torque, opposite the first torque, and lash crossing the input; operating the machine at the target speed. - View Dependent Claims (13, 14, 15, 16, 17, 18)
-
Specification